Regional Variation in Interior Alaskan Boreal Forests is Driven by Fire Disturbance, Topography, and Climate

2019 ◽  
Vol 100 (3) ◽  
Author(s):  
Carl A. Roland ◽  
Joshua H. Schmidt ◽  
Samantha G. Winder ◽  
Sarah. E. Stehn ◽  
E. Fleur Nicklen
Keyword(s):  
Boreal Forests ◽  
Regional Variation ◽  
Fire Disturbance

scholarly journals Regional variation in interior Alaskan boreal forests is driven by fire disturbance, topography, and climate

2019 ◽  
Vol 89 (3) ◽  
Author(s):  
Carl A. Roland ◽  
Joshua H. Schmidt ◽  
Samantha G. Winder ◽  
Sarah E. Stehn ◽  
E. Fleur Nicklen
Keyword(s):  
Boreal Forests ◽  
Regional Variation ◽  
Fire Disturbance

Advance regeneration and trajectories of stand development following the mountain pine beetle outbreak in boreal forests of British Columbia

2015 ◽  
Vol 45 (10) ◽  
pp. 1327-1337 ◽  
Author(s):  
Elizabeth M. Campbell ◽  
Joseph A. Antos
Keyword(s):  
British Columbia ◽  
Species Composition ◽  
Boreal Forests ◽  
Mountain Pine Beetle ◽  
Size Structure ◽  
Fire Disturbance ◽  
Active Management ◽  
Advance Regeneration ◽  
Mountain Pine ◽  
Pine Beetle

A mountain pine beetle (Dendroctonus ponderosae Hopkins) outbreak has recently spread into boreal forests, with unknown consequences for this ecosystem. We intensively sampled 12 stands affected by the current outbreak in northern British Columbia to determine the potential of western boreal forests to recover from this novel disturbance. We sampled the species composition, size structure, and spatial distribution (using 5 m × 5 m subplots, 40 per stand) of live and dead trees and used a variety of analyses, including ordinations, to assess potential developmental trajectories of stands. Advance regeneration (stems < 10 m tall) varied greatly in abundance among stands (50–18 280 stems·ha−1). However, most subplots contained at least one individual; only three stands had many empty subplots. We conclude that most stands have enough advance regeneration and residual canopy trees to form a nearly continuous new canopy. Ordinations indicate that species composition will shift substantially and become more divergent among stands. Species of high economic value will remain common, though, and active management will not be necessary in most stands to maintain productive forests. However, this novel disturbance will have very different effects on these forests than the typical fire-disturbance regime and is likely to deflect these forests into new successional trajectories.

Fire disturbance data improves the accuracy of remotely sensed estimates of aboveground biomass for boreal forests in eastern Canada

2017 ◽  
Vol 8 ◽  
pp. 71-82
Author(s):  
Dinesh Babu Irulappa Pillai Vijayakumar ◽  
Frédéric Raulier ◽  
Pierre Bernier ◽  
Sylvie Gauthier ◽  
Yves Bergeron ◽  
...  
Keyword(s):  
Aboveground Biomass ◽  
Boreal Forests ◽  
Remotely Sensed ◽  
Fire Disturbance ◽  
Eastern Canada

scholarly journals Mitigating the Effects of Climate Change through Harvesting and Planting in Boreal Forests of Northeastern China

2018 ◽  
Vol 10 (10) ◽  
pp. 3531 ◽  
Author(s):  
Xu Luo ◽  
Hong He ◽  
Yu Liang ◽  
Jacob Fraser ◽  
Jialin Li
Keyword(s):  
Climate Change ◽  
Forest Management ◽  
Boreal Forests ◽  
Fire Regime ◽  
Landscape Scale ◽  
Fire Disturbance ◽  
Ecological Resilience ◽  
Reference Scenario ◽  
Fire Occurrence ◽  
Management Scenario

The ecological resilience of boreal forests is an important element of measuring forest ecosystem capacity recovered from a disturbance, and is sensitive to broad-scale factors (e.g., climate change, fire disturbance and human related impacts). Therefore, quantifying the effects of these factors is increasingly important for forest ecosystem management. In this study, we investigated the impacts of climate change, climate-induced fire regimes, and forest management schemes on forest ecological resilience using a forest landscape model in the boreal forests of the Great Xing’an Mountains, Northeastern China. First, we simulated the effects of the three studied variables on forest aboveground biomass, growing space occupied, age cohort structure, and the proportion of mid and late-seral species indicators by using the LANDIS PRO model. Second, we calculated ecological resilience based on these four selected indicators. We designed five simulated scenarios: Current fire only scenario, increased fire occurrence only scenario, climate change only scenario, climate-induced fire regime scenario, and climate-fire-management scenario. We analyzed ecological resilience over the five scenarios from 2000 to 2300. The results indicated that the initialized stand density and basal area information from the year 2000 adequately represented the real forest landscape of that year, and no significant difference was found between the simulated landscape of year 2010 and the forest inventory data of that year at the landscape scale. The simulated fire disturbance results were consistent with field inventory data in burned areas. Compared to the current fire regime scenario, forests where fire occurrence increased by 30% had an increase in ecological resilience of 12.4–43.2% at the landscape scale, whereas increasing fire occurrence by 200% would decrease the ecological resilience by 2.5–34.3% in all simulated periods. Under the low climate-induced fire regime scenario, the ecological resilience was 12.3–26.7% higher than that in the reference scenario across all simulated periods. Under the high climate-induced fire regime scenario, the ecological resilience decreased significantly by 30.3% and 53.1% in the short- and medium-terms at landscape scale, while increasing slightly by 3.8% in the long-term period compared to the reference scenario. Compared to no forest management scenario, ecological resilience was decreased by 5.8–32.4% under all harvesting and planting strategies for the low climate-induced fire regime scenario, and only the medium and high planting intensity scenarios visibly increased the ecological resilience (1.7–15.8%) under the high climate-induced fire regime scenario at the landscape scale. Results from our research provided insight into the future forest management and have implications for improving boreal forest sustainability.

Do Boreal Forests Need Fire Disturbance to Maintain Productivity?

Ecosystems ◽  
2014 ◽  
Vol 17 (6) ◽  
pp. 1053-1067 ◽  
Author(s):  
Charles Ward ◽  
David Pothier ◽  
David Paré
Keyword(s):  
Boreal Forests ◽  
Fire Disturbance

Dynamics of the boreal forests of the Laurentian Highlands, Canada

1985 ◽  
Vol 15 (1) ◽  
pp. 252-261 ◽  
Author(s):  
Charles V. Cogbill
Keyword(s):  
Boreal Forests ◽  
Fire Disturbance ◽  
Stand Dynamics ◽  
Time Interval ◽  
Large Area ◽  
Feather Moss ◽  
Natural Fires ◽  
Jack Pine Forests ◽  
Overstory Trees ◽  
Tree Increment

Analyses of species composition and tree increment cores from 145 stands in central Québec were used to determine the forest history and stand dynamics. Windspread fires, possibly synchronous, burned across central Québec in at least three periods of record (1661–1663, 1779–1791, 1869–1871). The average fire rotation (time interval between natural fires burning the equivalent of a large area) for spruce – feather moss forests was approximately 130 years, and 70 years in either deciduous or jack pine forests. The traditional succession concept of continual recruitment leading to an all-aged forest was not evident in these forests. About 70% of the overstory trees were established in the first 30 years after fire disturbance, with little recruitment after this time. These initial trees dominate the canopy for up to 250 years with mortality becoming prominent after 130 years. The short average time between disturbances precludes the probable degeneration into old shrub-filled stands typical of old age.

Regional Variation in Patient Participation and Treatment among Acoustic Neuroma Association Survey Respondents Across the United States

2020 ◽  
Author(s):  
John P. Marinelli ◽  
Samuel A. Spear ◽  
Debbie L. Hahs-Vaughn ◽  
Robert J. Macielak ◽  
Michael J. Link ◽  
...  
Keyword(s):  
United States ◽  
Acoustic Neuroma ◽  
Patient Participation ◽  
Regional Variation ◽  
The United States
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